Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

1. A sum of rs.850 is divided into three parts, proportional to 1/3:2/5:3/7 find the value of the first part?

A. Rs.280.50 B. Rs.242.75 C. Rs.269 D. Rs. 243.85 2.if an amount gets doubles in 6years at simple intrest, then is how many years will it become 4 times? A. 18 years B. 12 years C. 10 years D. 15 years 3. What is the fourth proportional to 3,9,21,? Which number replaces the question mark? A. 81 B. 27 C. 54 D. 63 4. A shopkeeper doubles the selling price as a result profit triples. What is the profit percentage of the shopkeeper? A. 80% B. 100% C. 75% D. 66% 5. A train wheel of diameter of 49cm travels a distance of 154km. How many numbers of revolutions does the wheel make? A. 96 B. 108 C. 100 D. 120

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

1) x: y: z = 1/3 : 2/5 : 3/7 = multiply by LCM of denominators = 35/105 : 42/105 : 45/105 X gets 35/105 * 850

2) Sum becomes twice in 6 years in simple interest. Sum = 2 P = P + P (r/100) 6 => r 6/100 = 1 => r = 100/6 % Sum = 4 P = P + P * 100/(6*100) t => t = 3 * 6 = 18 years